Power conversion circuit and power conversion device

A power conversion circuit comprising:

• a first input terminal, a second input terminal, and a third input terminal that are connected to a three-phase AC power supply, and that receive, on a one-to-one basis, a first voltage, a second voltage, and a third voltage which are AC voltages having phases different from one another;
• a first output terminal and a second output terminal configured to output AC power;
• a plurality of bidirectional switches;
• and
• a control circuit configured to control each of the plurality of bidirectional switches,
• wherein the plurality of bidirectional switches include
• a first high-side bidirectional switch that connects the first input terminal and the first output terminal,
• a first low-side bidirectional switch that connects the first input terminal and the second output terminal,
• a second high-side bidirectional switch that connects the second input terminal and the first output terminal,
• a second low-side bidirectional switch that connects the second input terminal and the second output terminal,
• a third high-side bidirectional switch that connects the third input terminal and the first output terminal, and
• a third low-side bidirectional switch that connects the third input terminal and the second output terminal, and
• wherein, where X° represents a phase at which the first voltage reaches a maximum,
• in a specific predetermined period proximate to a transposition of a magnitude relationship between the second voltage and the third voltage,
• the circuit is configured to
• control the third low-side bidirectional switch and the second low-side bidirectional switch to switch ON/OFF states of the bidirectional switches without an overlap between a first state and a second state, the first state being a state in which the third low-side bidirectional switch allows a current to flow between the second output terminal to the third input terminal, and the second state being a state in which the second low-side bidirectional switch allows a current to flow between the second input terminal to the second output terminal, and
• control the second high-side bidirectional switch and the third high-side bidirectional switch to switch the ON/OFF states of the bidirectional switches without an overlap between a third state and a fourth state, the third state being a state in which the second high-side bidirectional switch allows a current to flow between the second input terminal to the first output terminal, and the fourth state being a state in which the third high-side bidirectional switch allows a current to flow between the first output terminal to the third input terminal.